/* SPDX-License-Identifier: GPL-2.0 */
#ifndef ASM_GENERIC_PGTABLE_NOPUD_H
#define ASM_GENERIC_PGTABLE_NOPUD_H

#ifndef __ASSEMBLY__

#include <asm-generic/pgtable-nop4d.h>

#define __PAGETABLE_PUD_FOLDED  1

/*
 * Having the pud type consist of a p4d gets the size right, and allows
 * us to conceptually access the p4d entry that this pud is folded into
 * without casting.
 */
typedef struct { p4d_t p4d; } pud_t;
#define pud_val(x)				(p4d_val((x).p4d))
#define __pud(x)				((pud_t) { __p4d(x) })

#define PUD_SHIFT       P4D_SHIFT
#define PTRS_PER_PUD        1
#define PUD_SIZE        (1UL << PUD_SHIFT)
#define PUD_MASK        (~(PUD_SIZE - 1))

/*
 * The "p4d_xxx()" functions here are trivial for a folded two-level
 * setup: the pud is never bad, and a pud always exists (as it's folded
 * into the p4d entry)
 */
static inline int p4d_none(p4d_t p4d)       { return 0; }
static inline int p4d_bad(p4d_t p4d)        { return 0; }
static inline int p4d_present(p4d_t p4d)    { return 1; }
static inline void p4d_clear(p4d_t *p4d)    { }
#define pud_ERROR(pud)          (p4d_ERROR((pud).p4d))

#define p4d_populate(p4d, pud)      do { } while (0)
/*
 * (puds are folded into p4ds so this doesn't get actually called,
 * but the define is needed for a generic inline function.)
 */
#define set_p4d(p4dptr, p4dval)	set_pud((pud_t *)(p4dptr), (pud_t) { p4dval })

static inline pud_t *pud_offset(p4d_t *p4d, unsigned long address)
{
    return (pud_t *)p4d;
}
#define pud_offset pud_offset

#define p4d_page(p4d)				(pud_page((pud_t){ p4d }))
#define p4d_pgtable(p4d)			((pud_t *)(pud_pgtable((pud_t){ p4d })))

#define pud_alloc_one(mm, address)		NULL
#define pud_free(mm, x)				do { } while (0)
#define pud_free_tlb(tlb, x, a)		        do { } while (0)

#undef  pud_addr_end
#define pud_addr_end(addr, end)			(end)

#endif /* !__ASSEMBLY__ */
#endif /* !ASM_GENERIC_PGTABLE_NOPUD_H */
